Non-Rising Stem Gate Valve

Non‑rising stem gate valves are compact shut‑off valves whose stem rotates without outward extension, ideal for confined or underground installation spaces. Built with ductile iron, cast iron or stainless‑steel bodies, they support resilient EPDM, NBR, neoprene or metal‑to‑metal seats for bi‑directional tight zero‑leakage sealing. Multiple actuation options include manual handwheel, electric, pneumatic and hydraulic drives. These valves deliver low‑flow‑resistance full‑bore flow and comply with AWWA, DIN and BS standards. Widely deployed in water, wastewater, flood‑control, irrigation, power‑cooling and general industrial pipeline isolation. Core keywords: non‑rising stem, bi‑directional sealing, full‑bore, pipeline isolation, multi‑mode actuation, underground service, zero‑leakage shut‑off.